Spezielle Anwendungen des VLSI Entwurfs Special applications of VLSI design

1
Spezielle Anwendungen des VLSI Entwurfs
Special applications of VLSI design

• Course and contest
• Results of Phase 1
• Frank Lebahn Christoph Leif Oesterheld

2
Design and architecture

• direct form I

x_in
reg(0)
reg(1)
reg(8)
reg(9)

Coeff(0)
Coeff(1)
Coeff(8)
Coeff(9)
y_out
0

3
Design and architecture

• Adder ripple carry adder
• Multiplier Scaling Accumulator Multiplier
• We expect slower then and operations

4
Facts

• No pipelining until now
• Levels of Logic 27
• 20.930ns (9.365ns logic, 11.565ns route)

5
Next steps on phase 2

• Direct form II -gt balanced tree architecture -gt
• Faster adder, maybe Carry Select
• Reduce redundancy
• Multiplier Constant Multipliers from Adders
  (explicit shifting for each Multiplier)
• Pipelining
• Coefficients variations (reduce operations)
• We expect more speed